A grid of smiley faces renders in SVG, each with a distinct face color. The faces are built from reusable React components for the background circle, eyes, and mouth, with random variation in eye radius, mouth width, and mouth radius. The mouth uses a D3 arc path generator (d3.arc), while the face container translates each group into place. The example demonstrates composing D3 with React functional components for data-driven, declarative SVG visualization.